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charset="UTF-8" X-Stat-Signature: 9yokxr68fruo5r1ciu3cnxa65chjfact X-Rspam-User: X-Rspamd-Queue-Id: 6B388180003 X-Rspamd-Server: rspam06 X-HE-Tag: 1747266256-74201 X-HE-Meta: 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 TwvPnswT 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: This script wraps other tests to check that HugeTLB statistics are restored to what they were before the test was run. Does not account HugeTLB statistics updated by other non-test processes running in the background while the test is running. Change-Id: I1d827656ef215fd85e368f4a3629f306e7f33f18 Signed-off-by: Ackerley Tng --- ...memfd_wrap_test_check_hugetlb_reporting.sh | 95 +++++++++++++++++++ 1 file changed, 95 insertions(+) create mode 100755 tools/testing/selftests/kvm/guest_memfd_wrap_test_check_hugetlb_reporting.sh diff --git a/tools/testing/selftests/kvm/guest_memfd_wrap_test_check_hugetlb_reporting.sh b/tools/testing/selftests/kvm/guest_memfd_wrap_test_check_hugetlb_reporting.sh new file mode 100755 index 000000000000..475ec5c4ce1b --- /dev/null +++ b/tools/testing/selftests/kvm/guest_memfd_wrap_test_check_hugetlb_reporting.sh @@ -0,0 +1,95 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-only +# +# Wrapper that runs test, checking that HugeTLB-related statistics have not +# changed before and after test. +# +# Example: +# ./guest_memfd_wrap_test_check_hugetlb_reporting.sh ./guest_memfd_test +# +# Example of combining this with ./guest_memfd_provide_hugetlb_cgroup_mount.sh: +# ./guest_memfd_provide_hugetlb_cgroup_mount.sh \ +# ./guest_memfd_wrap_test_check_hugetlb_reporting.sh \ +# ./guest_memfd_hugetlb_reporting_test +# +# Copyright (C) 2025, Google LLC. + +declare -A baseline + +hugetlb_sizes=( + "2048kB" + "1048576kB" +) + +statistics=( + "free_hugepages" + "nr_hugepages" + "nr_overcommit_hugepages" + "resv_hugepages" + "surplus_hugepages" +) + +cgroup_hugetlb_sizes=( + "2MB" + "1GB" +) + +cgroup_statistics=( + "limit_in_bytes" + "max_usage_in_bytes" + "usage_in_bytes" +) + +establish_statistics_baseline() { + for size in "${hugetlb_sizes[@]}"; do + + for statistic in "${statistics[@]}"; do + + local path="/sys/kernel/mm/hugepages/hugepages-${size}/${statistic}" + baseline["$path"]=$(cat "$path") + + done + + done + + if [ -n "$HUGETLB_CGROUP_PATH" ]; then + + for size in "${cgroup_hugetlb_sizes[@]}"; do + + for statistic in "${cgroup_statistics[@]}"; do + + local rsvd_path="${HUGETLB_CGROUP_PATH}/hugetlb.${size}.rsvd.${statistic}" + local path="${HUGETLB_CGROUP_PATH}/hugetlb.${size}.${statistic}" + + baseline["$rsvd_path"]=$(cat "$rsvd_path") + baseline["$path"]=$(cat "$path") + + done + + done + + fi +} + +assert_path_at_baseline() { + local path=$1 + + current=$(cat "$path") + expected=${baseline["$path"]} + if [ "$current" != "$expected" ]; then + echo "$path was $current instead of $expected" + fi +} + +assert_statistics_at_baseline() { + for path in "${!baseline[@]}"; do + assert_path_at_baseline $path + done +} + + +establish_statistics_baseline + +$@ + +assert_statistics_at_baseline -- 2.49.0.1045.g170613ef41-goog